Induction-coil.



PATENTED JUNE 23, 1903.

J. SPLITDORF.

INDUCTION COIL.

APPLICATION FILED APR. 8, 1903.

H0 MODEL.

Patented June 23, 1903.

PATENT OFFICE.

JOHN SPLITDORF, OF NEWV YORK, N. Y.

INDUCTION-COIL.

SPECIFICATION forming part of Letters Patent No. 732,014, dated June 23, 1903. Application filed April 8, 1903. Serial No. 151,627. (No model.)

To all whom, it may concern:

Be it known that 1, JOHN SPLITDORF, a citizen of the United States of America, and a resident of the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Induction-Coils, of which the following is a specification.

Then a spark is no longer produced between the contact-points in the secondary circuit of an induction-coil with the operation of the usual engine make-and-break device, one of the causes to which such failure can be attributed often proves to be adherence of the spring-held armature or vibrator to the contact-point of the adjusting-screw, whereby discharge of the primary circuit occurs only at said engine make and break, an easier path being thus provided than that which includes the usual condenser. Because sticking of the vibrator is a matter of common occurrence, as when the engine is running at high speed,and is very detrimental to the even running of explosion-engines using the jump-spark form of ignition it is evidently extremely desirable that means should be provided insuring the production; of sparking between the secondary sparkpoints irrespective of as well as in conjunction with the vibratory action of the armature. To this end I have afteraseries of eX periments evolved means whereby the operation of the engine make and break or its equivalent positively insures the production of the secondary jump-spark under all conditions of activity or inactivity of the armature-spring.

In brief, my invention consists in the employment of an auxiliary condenser insulated from the usual condenser or from other members or elements of the coil with which it may be approximated,but whose location is a matter of indifference or convenience. One of the terminals of said auxiliary condenser is included with a terminal of the usual con denser and the vibrator in the primary circuit, while the opposite terminal of said auxiliary condenser is indifferently in contact with the opposite terminal of the primary or in the circuit in which said terminal is located.

The practice of my invention shows that when the armature-spring sticks or is held firmly against the point of the adjustingscrew, preventing break of the circuit at that point, then at every break caused by the engine make-and-break device a strong and lurid discharge occurs between the secondary spark-points. There is no uncertainty about this; but, on the contrary, it can be depended upon positively with every operation of the engine make-and-break device, and, furthermore, the spark is of such generous proportions as to insure the ignition of the gaseous charge to be exploded thereby.

In order that my invention may be clearly t understood and explained in detail, I have annexed hereto a sheet of drawings,wherein-- Figure l is a diagrammatic view of an induction-coil with the various terminals and contacts and showing my auxiliary condenser in circuit; and Fig. 2-is an elevation of the same in perspective, including the coilcasing.

In said views, let A indicate the usual core, composed of a bundle of soft-iron wires; B, the primary, and C the secondary windings. The usual insulation of the wires themselves and intermediate the windings and the core will be understood as arranged in the usual manner.

c 0 indicate the terminals or opposed sparkpoints of the secondary winding.

D indicates a battery or other source of electrical energy, and E is intended to represent the usual make-and-break device, located in the circuit between the primary and battery and arranged to be operated bya cam or other moving member of the engine equipment. A binding-post, as F, mounted upon the coil-casing G, receives the battery-ter-.

minal d and the primary terminal I), while a binding-post, as H, receives the battery-terminal d and one end of a short connecting- Wire J, whose opposite end is connected with the usual bridge, as K, which supports the adj usting-screw L. The circuit is completed through the vibrator spring-arm M (carrying armature m) and its support N, the latter having connected therewith the terminal b of the primary.

So far we have described the usual component elements of a jump-spark coil, the operation of which is well known. In incorporating my improvement therein I provide an auxiliary condenser, as O, locating sameas, for instance, Within the lower part of the easing G-either above or beneath the usual condenser, but separated therefrom, as by insulation 0, or, said auxiliary condenser being located exterior to casing G, at any convenient point,it being unnecessary for said auxiliary condenser in the performance of its functions to be in oontiguity to the usual condenser or to any other element of the coil. One terminal, 0, of the auxiliary condenser connects with the mount N, while the opposite terminal, 0 connects with the bindingpost F. This latter connection is for convenience, since the effect is the same whether said terminal 0 be in contact with said bindingpost F or with either of the terminals b or It will be seen that the main condenser is in series with the primary of the inductioncoil, while the auxiliary condenser is in parallel relation thereto.

Having now described my invention, I declare that What I claim is- 1. In an induction-coil having the usual condenser to discharge the primary through the vibrator, an auxiliary condenser to discharge said primary independently of said vibrator.

2. In an inductioncoil having a condenser to receive the primary discharge from one pole thereof, an auxiliary condenser to receive said discharge from the opposite pole.

3. An auxiliarycondenserforaninductioncoil, one terminal of said condenser being located in the path between the primary and source of energy which includes the engine make and break.

4. The combination with a spark-coil, of a pair of condensers, one being arranged in series with the primary of the spark-coil, and the other being arranged in parallel relation thereto.

5. A spark-coil having the usual primary and secondary windings, and a pair of condensers, one in series with the primary, and the other in parallel relation thereto,in combination with the usual circuit making and breaking devices whereby a succession of discharges is made in the secondary circuit.

6. The combination with a spark-coil, of a condenser in series with the primary thereof, a short circuit adapted to cut out the said condenser, means for intermittently interrupting the short circuit, and an auxiliary condenser in parallel relation to the primary, the said auxiliary condenser being adapted to be brought into action by an external make-and-break device independently of the means for intermittently interrupting the short circuit.

Signed at New York this 31st day of March, 1903.

JOHN SPLITDORF.

Witnesses:

NAT. B. CHADSEY, F. W. BARKER. 

